National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorm, Flooding, and Winter Weather Threats on Tuesday

Scattered severe thunderstorms are forecast Tuesday from the southern Plains into the southern Great Lakes vicinity. Thunderstorms may also produce heavy to excessive rain that could pose a flooding threat from central Texas into southern Oklahoma and northern Missouri into southern Michigan. A heavy wintry mix is forecast for the Great Lakes into northern Maine. Read More >

Current conditions at

Grand Coulee Dam Airport (K3W7)

Lat: 47.92205°NLon: 119.083°WElev: 1593.0ft.

Partly Cloudy

41°F

5°C

Humidity 38%
Wind Speed SW 14 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 09 Mar 07:30 PM PDT
Extended Forecast for

Grand Coulee WA

  • Tonight

    Tonight: Partly cloudy, with a low around 29. West wind 5 to 13 mph.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 46. Southwest wind 5 to 14 mph, with gusts as high as 23 mph.

    High: 46 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 33. South wind 10 to 13 mph, with gusts as high as 21 mph.

    Low: 33 °F

    Slight Chance
    Snow

  • Wednesday

    Wednesday: A chance of rain and snow between 11am and 2pm, then a chance of rain after 2pm. Partly sunny, with a high near 51. Breezy, with a south wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 51 °F

    Chance
    Rain/Snow and
    Breezy

  • Wednesday Night

    Wednesday Night: Rain likely. Mostly cloudy, with a low around 42. Windy, with a southwest wind 22 to 26 mph, with gusts as high as 48 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Rain Likely
    and Windy

  • Thursday

    Thursday: A 50 percent chance of rain. Mostly cloudy, with a high near 54. Windy.

    High: 54 °F

    Chance Rain
    and Windy

  • Thursday Night

    Thursday Night: A chance of rain before 2am, then a chance of rain and snow. Mostly cloudy, with a low around 40. Breezy. Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 40 °F

    Chance Rain
    and Breezy
    then Chance
    Rain/Snow

  • Friday

    Friday: Rain likely, possibly mixed with snow, becoming all rain after 2pm. Mostly cloudy, with a high near 55. Chance of precipitation is 60%.

    High: 55 °F

    Rain/Snow
    Likely

  • Friday Night

    Friday Night: A chance of rain before 2am, then a chance of rain and snow. Mostly cloudy, with a low around 37. Chance of precipitation is 50%.

    Low: 37 °F

    Chance Rain
    then Chance
    Rain/Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 29. West wind 5 to 13 mph.
Tuesday
Sunny, with a high near 46. Southwest wind 5 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 33. South wind 10 to 13 mph, with gusts as high as 21 mph.
Wednesday
A chance of rain and snow between 11am and 2pm, then a chance of rain after 2pm. Partly sunny, with a high near 51. Breezy, with a south wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 42. Windy, with a southwest wind 22 to 26 mph, with gusts as high as 48 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 54. Windy.
Thursday Night
A chance of rain before 2am, then a chance of rain and snow. Mostly cloudy, with a low around 40. Breezy. Chance of precipitation is 50%. Little or no snow accumulation expected.
Friday
Rain likely, possibly mixed with snow, becoming all rain after 2pm. Mostly cloudy, with a high near 55. Chance of precipitation is 60%.
Friday Night
A chance of rain before 2am, then a chance of rain and snow. Mostly cloudy, with a low around 37. Chance of precipitation is 50%.
Saturday
A slight chance of rain and snow before 11am. Mostly sunny, with a high near 52. Chance of precipitation is 20%.
Saturday Night
Mostly cloudy, with a low around 35.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 51. Chance of precipitation is 30%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 40. Chance of precipitation is 40%.
Monday
A chance of rain and snow. Mostly cloudy, with a high near 57. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Coulee WA
 47.94°N 119.02°W (Elev. 1601 ft)
Last Update:
6:47 pm PDT Mar 9, 2026
Forecast Valid:
7pm PDT Mar 9, 2026-6pm PDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation